Lithium aluminate powder, which can be used for tritum breeding material application due to its thermal and mechanical properties, were prepared by fuel-assisted combustion synthesis from lithium nitrate and aluminum nitrate. Various fuels such as citric acid, urea, glycine, and mixed fuels of citric acid and urea were tested for synthesis. A mixed fuel of citric acid and urea was found to produce gamma lithium aluminate powder with a good crystallinity. A proper mixing composition of reactants was found to be 5/18M of citric acid and 45/18M of urea for 1M of each nitrate. The synthesized powder has an average particle size of 0.14 micrometer and the specific surface area of 16.4 square meter per gram. The activation energy of the combustion synthesis was found to be 54.4±6.4kJ/mole.